<th class="alfresco-lists-views-layouts-HeaderCell" data-dojo-attach-point="containerNode" data-dojo-attach-event="ondijitclick:onSortClick" tabindex="0">
   <span class="label" data-dojo-attach-point="labelNode">${label}</span>
   <img src="${transparentImageUrl}" class="ascendingSort" data-dojo-attach-point="ascendingSortNode" />
   <img src="${transparentImageUrl}" class="descendingSort" data-dojo-attach-point="descendingSortNode" />
</th>